resistance of metal wire of length 5 M is 100 ohm if the area of cross section of wire is 3 into 10 to the power minus 7 calculate the resistivity of the metal
Answers
Resistivity is the resistance per unit length and cross-sectional area.
It is the property of the material that opposes the flow of charge or the flow of electric current.
Resistance of material is given by
R = ρL / A
R – Resistance of material = 100 Ohm
L = Length of wire = 5 m
A = area of cross section = 3x10^-7 square m
ρ = Resistivity of the material
Hence resistivity = RA/L = 100 x 3 x 10^-7 / 5
= 6x10^-6 ohm-meter.
Answer:
Resistivity is the resistance per unit length and cross-sectional area.
It is the property of the material that opposes the flow of charge or the flow of electric current.
Resistance of material is given by
R= pL /A
R Resistance of material = 100 Ohm
L= Length of wire = 5 m =
A = area of cross section = 3x10^-7 square m
p = Resistivity of the material
Hence resistivity = RA/L = 100 x 3 x 10^-7 | 5
6x10^-6 ohm-meter.